Hi, Rusty!
Oh dear!
I was quite pleased with my parsing! (even if it is wrong, it seemed satisfying to me!)
Yes, I agree about the "Eureka" aspect...but it doesn' t fit with the parsing (does it?)
Yes, I too think that "ha" is the laugh reversed.......but I think "aha" is what is meant to be considered further in the clue....
Anne B gives "minute" for "moment".
And how are you accounting for the word "crossword" in the clue?
If that is not tied up what an "aha moment" what would you say is the 'definition'?
(I could well be way off beam....but it would be nice to know the answer!)
I've finished the Everyman - and no ST as yet!